A laser with a power output of 2.00 mW at a wavelength of 400 nm is projected
Question:
A laser with a power output of 2.00 mW at a wavelength of 400 nm is projected onto calcium metal.
(a) How many electrons per second are ejected?
(b) What power is carried away by the electrons, given that the binding energy is 2.71 eV?
(c) Calculate the current of ejected electrons.
(d) If the photoelectric material is electrically insulated and acts like a 2.00-pF capacitor, how long will current flow before the capacitor voltage stops it?
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a The energy of a single photon is given by E hc where E is the energy of a single photon J h is Plancks constant 663 10 Js c is the speed of light 30...View the full answer
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